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    Helium for airships

    Engineering Index Backfile | 1921
    Keywords: Helium

    Use of helium in airships

    Crocco, Arturo G | NTRS | 1923
    Keywords: HELIUM

    Helium and its value for airships

    Litchfield, P.W. | Engineering Index Backfile | 1925
    Keywords: Helium

    Train wreck test for steel sphere to carry helium

    Engineering Index Backfile | 1929
    Keywords: Helium

    Helium purification plant of Zeppelin station in Frankfurt

    Hausen, M.H. | Engineering Index Backfile | 1938
    Keywords: Helium

      Helium purification plant of Zeppelin station in Frankfurt

      Hausen, M.H. | Engineering Index Backfile | 1938
      Keywords: Helium

    Final Report (Balloon Launching)

    NTIS | 1954
    Keywords: Helium